/* ============================================
   LAYOUT - Grid, Container, Navbar, Drawer
   ============================================ */

/* Base Layout */
:root {
    --primary-color: #2c3e66;
    --primary-light: #eef2fa;
    --secondary-color: #5a6e8a;
    --accent-color: #4a90e2;
    --success-color: #2e7d64;
    --warning-color: #b8661e;
    --danger-color: #c23d3d;
    --gray-50: #f8f9fc;
    --gray-100: #f0f2f5;
    --gray-200: #e4e7ec;
    --gray-300: #d0d5dd;
    --gray-400: #98a2b3;
    --gray-500: #667085;
    --gray-600: #475467;
    --gray-700: #344054;
    --gray-800: #1d2939;
    --gray-900: #101828;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.05), 0 1px 2px rgba(0,0,0,0.03);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -1px rgba(0,0,0,0.03);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.05), 0 4px 6px -2px rgba(0,0,0,0.02);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.05), 0 10px 10px -5px rgba(0,0,0,0.01);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.4s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: var(--gray-50);
    color: var(--gray-800);
    line-height: 1.5;
    min-height: 100vh;
}

/* Main Container */
.main-container {
    min-height: calc(100vh - 70px);
}

/* Top Navbar (Desktop) */
.top-navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: white;
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--gray-200);
}

.navbar-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 2rem;
    max-width: 1440px;
    margin: 0 auto;
}

/* Brand */
.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.brand-logo {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.brand-text h1 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
    color: var(--gray-800);
}

.brand-text p {
    font-size: 0.7rem;
    margin: 0;
    color: var(--gray-500);
}

/* Desktop Navigation */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    color: var(--gray-600);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.nav-link i {
    font-size: 1.1rem;
}

.nav-link:hover {
    background: var(--gray-100);
    color: var(--primary-color);
}

.nav-link.active {
    background: var(--primary-light);
    color: var(--primary-color);
}

/* Logout Button */
.btn-logout {
    background: none;
    border: none;
    padding: 0.5rem 1rem;
    color: var(--danger-color);
    font-weight: 500;
    font-size: 0.875rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.btn-logout:hover {
    background: #fee2e2;
}

/* Hamburger Button (Mobile) */
.hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--gray-700);
    margin: 5px 0;
    transition: all var(--transition-fast);
}

/* Mobile Drawer */
.drawer-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1002;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.drawer-overlay.open {
    opacity: 1;
    visibility: visible;
}

.mobile-drawer {
    position: fixed;
    top: 0;
    left: -280px;
    width: 280px;
    height: 100%;
    background: white;
    z-index: 1003;
    box-shadow: var(--shadow-xl);
    transition: left var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.mobile-drawer.open {
    left: 0;
}

.drawer-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.drawer-header img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.drawer-header h3 {
    font-size: 0.9rem;
    font-weight: 600;
}

.drawer-header p {
    font-size: 0.7rem;
    color: var(--gray-500);
}

.drawer-nav {
    flex: 1;
    padding: 1rem 0;
}

.drawer-nav a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    color: var(--gray-700);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.drawer-nav a:hover {
    background: var(--gray-100);
}

.drawer-nav a.active {
    background: var(--primary-light);
    color: var(--primary-color);
}

.drawer-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--gray-200);
}

/* Content Wrapper */
.content-wrapper {
    max-width: 1280px;
    margin: 0 auto;
    padding: 2rem;
}

/* Page Header */
.page-header {
    margin-bottom: 2rem;
    animation: fadeInUp 0.5s ease;
}

.page-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 0.25rem;
}

.page-header p {
    color: var(--gray-500);
    font-size: 0.875rem;
}

/* Cards */
.card-modern {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    border: 1px solid var(--gray-200);
    overflow: hidden;
}

.card-modern:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.card-header-custom {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--gray-200);
    background: white;
}

.card-body-custom {
    padding: 1.5rem;
}

/* Dashboard Stats Row */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    border: 1px solid var(--gray-200);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-info h3 {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-800);
}

.stat-icon {
    width: 48px;
    height: 48px;
    background: var(--primary-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--primary-color);
}

/* Responsive */
@media (max-width: 768px) {
    .navbar-container {
        padding: 0.75rem 1rem;
    }

    .nav-menu {
        display: none;
    }

    .hamburger {
        display: block;
    }

    .content-wrapper {
        padding: 1rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .content-wrapper {
        padding: 1.5rem;
    }
}